ECMAScript Cookbook

How to do it...

1. Open your command line application and navigate to your workspace.
2. Create a new folder named 08-10-use-throw-to-simulate-abstract-class.
3. Copy or create an index.html that loads and runs a main function from main.js.

4. Create a main.js file that defines a new class named Rocket. In the constructor, check the constructor of the instance, if it's Rocket, then throw an error:

// main.js 
class Rocket { 
  constructor (name) { 
    this.name = name; 
    if (this.constructor === Rocket) { 
      throw new Error('Abstract Class Should not be       instantiated'); 
    } 
  } 
}  

5. Create two child classes of Rocket:

// main.js 
class ActiveRocket extends Rocket {} 
class InactiveRocket extends Rocket {} 

6. Create a main function that creates instances of each class ...